Samrat Choudhary, Deputy Chief Minister until yesterday, on Wednesday took oath as Bihar Chief Minister, becoming the first BJP leader to occupy the top post in the state. The BJP has chief ministers in Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Rajasthan, Uttarakhand, Haryana, Delhi - all major Hindi heartland states with Bihar as the notable exception. That officially changed today with the elevation of BJP's Samrat Choudhary to the state's top post.